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Silicon-nitrile-based hybrid resin and synthesizing method thereof

A synthesis method and technology of silicon-based nitrile, which are applied in the field of organic synthetic polymer materials, can solve the problems of application difficulty and low temperature environment of liquid nitrogen, and achieve the effects of low reaction temperature, excellent mechanical properties and good thermal stability.

Active Publication Date: 2016-02-10
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of monomer has an unavoidable shortcoming. Due to the existence of Si-N bonds, it is easy to hydrolyze, so it must be stored in a strictly anhydrous environment, and requires a low temperature environment of liquid nitrogen, resulting in many difficulties in application.

Method used

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  • Silicon-nitrile-based hybrid resin and synthesizing method thereof
  • Silicon-nitrile-based hybrid resin and synthesizing method thereof
  • Silicon-nitrile-based hybrid resin and synthesizing method thereof

Examples

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Embodiment 1

[0035] A silicon-based nitrile-based hybrid resin of the present invention has a molecular structural formula of the following formula (I):

[0036]

[0037] The number average molecular weight of the silicon-based nitrile-based hybrid resin is 7000-13000.

[0038] A kind of synthetic method of the silicon-based nitrile-based hybrid resin of above-mentioned present embodiment, comprises the following steps:

[0039] (1) Under the protection of nitrogen, mix and dissolve 0.0075mol of mercaptopropylmethylsiloxane (number average molecular weight is 4000-7000, kinematic viscosity is 75cSt~150cSt), 0.01125mol of anhydrous potassium carbonate in 20ml of dimethyl Sulfoxide DMSO (solvent), stirred at room temperature (35° C.) for 1 hour to obtain a solution containing potassium siloxane mercapto salt.

[0040] (2) Add 0.0075 mol of 4-nitrophthalonitrile to the above solution containing potassium siloxane mercapto salt, and stir at room temperature (35° C.) for 24 hours to obtain ...

Embodiment 2

[0044] A silicon-based nitrile-based hybrid resin of the present invention is the same as in Example 1.

[0045] A kind of synthetic method of the silicon-based nitrile-based hybrid resin of this embodiment, the steps are basically the same as in Example 1, the difference is only: in the step (1), the solvent used is N, N-dimethylformamide DMF, The stirring time is 2 hours; in step (2), the stirring time is 16 hours.

Embodiment 3

[0047] A silicon-based nitrile-based hybrid resin of the present invention is the same as in Example 1.

[0048] A kind of synthetic method of the silicon-based nitrile-based hybrid resin of this embodiment, the steps are basically the same as in Example 1, the difference is only: in the step (1), the solvent used is 1,4-dioxane, and the stirring time For 3 hours; in step (2), the stirring time was 22 hours.

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Abstract

The invention discloses silicon-nitrile-based hybrid resin and a synthesizing method thereof. The molecular structural formula of the silicon-nitrile-based hybrid resin is shown as a formula (I). The synthesizing method comprises the following steps that reacting is performed by taking sulfydryl propyl methylsiloxane and 4-nitrophthalonitrile as main raw materials, and then the silicon-nitrile-based hybrid resin is obtained. The silicon-nitrile-based hybrid resin has the advantages of being low in melting point, capable of resisting high temperature, not prone to hydrolysis, excellent in heat stability and curing performance and the like; the synthesizing method is simple and easy to control, lower in reaction temperature, shorter in time and suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of organic synthetic polymer materials, and relates to a silicon-based nitrile-based hybrid resin and a synthesis method thereof, in particular to a silicon-based nitrile-based hybrid resin with a low melting point and high temperature resistance and a synthesis method thereof. Background technique [0002] The rapid progress of the aerospace industry has put forward higher requirements on the high temperature resistance and oxidation resistance of materials. Silicon-containing polymers can meet this requirement well due to their excellent high temperature resistance and oxidation resistance. At the same time, phthalonitrile resin is a new type of high temperature resistant thermosetting resin. Its cured product has good thermal stability and mechanical properties, as well as excellent thermal oxygen stability, flame retardancy and good moisture resistance. Aerospace, ships, microelectronics and machinery ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/388
Inventor 盛丽萍尹昌平邢素丽肖加余曾竟成李侯君
Owner NAT UNIV OF DEFENSE TECH
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